Wheel.



No. 781,576. PATENTED JAN. 31, 1905. W. W. WALLACE.

WHEEL.

APPLICATION FILED D1106, 1904.

Witness es: Inventor:

W Maw/7m Wax NTTED STATES Patented January 31, 1905.

PATENT @rrrcn.

WHEEL.

SPECIFICATION forming part of Letters Patent No. 781,576, dated anuary 31, 1905.

Application filed December 5,1904. Serial No. 235,491.

Be it known that I, \Vrnnun \V. \VALLAcn, a citizen of the United States. residing at Knoxville. in the county of Knox and State of 'Ienuessee. have invented a new and useful Improvement in \Vheels, of which the following is a specilication. reference being had to the accompanying drawings.

.\Iy invention relates particularly to carwheels which are adapted to rotate upon the end oi an axle. having an annular groove to receive a key or similar member, which also engages the hub of the wheel, whereby the wheel is held against longitudinal movement upon the axle.

The object of my invention is to provide improved means for controlling such ke and for the introduction of lubricating-oil into the interior ot' the hub of the wheel.

In the accompanying drawings, Figure Iis a longitudinal sectional elevation. showing my improved wheel applied to an axle. Fig. 2 isa transverse detail section at one side of the key. Fig. 3 is a detail elevation of the valved lOCl\'- ing-plug. Fig. I is an end elevation of said valved locking-plug.

Referring tosaid drawings, 1 is the axle, 3 is the wheel. and l is the hub. The hub is closed across the end ot' the axle. The axle has an annular groove 2. and adjacent said groove the lateral wall of the hub is provided with a recess of approximately the width of said groove and ot' sutlicient depth to receive the entire m'escent-sliape key 6 when the wheel is to be, removed from or placed upon the axle. Normally said hey extends into the groove '2. as well as into the recess 5. and then said ltey prevents the wheel from moving 1011- i gitudinally upon the axle. Parallel to the axle the huh is provided with a cylindric aperture 7, which cuts the recess 5 justoutsideot the outer peripheral tace of the key when the latter extends its normal distance into the groove 2.

To hold the key 6 in its normal position in the recess and the groove 2. a locking-plug h is threaded into the aperture 7. so as to prevent said lcey from falling when the wheel is so turned as to bring the key beneath the axle. Said locking-plug is tubular and provided with a valve tor the introduction of lubricatingoil.

In the form shown in the drawings the interior ot' the plug is contracted near the outer end of the plug to form an inward-directed concave valve-seat .9 for the reception oi a hall It). Said hall is held yieldiugly to said seatby a coiled spring 11, one end of which bears against said hall and the other end of which bears agairst a diaphragm or plate I). which ahuts against a transverse shal't 1?. the ends of which rest in the wall oi said locking-plug. Said locking-plug may he provided with any suitable means for engagement with a screwdriver or other tool for turning said plug. For this purpose the drawings show radial notches 8 extending into the outer end of said plug for the reception of a screw-driver blade. Said locking-plug is made tubular and provided with the automatic valve shown in order that said plug may serve for the ready insertion of oil into the interior of the wheelhub without the removal ot said plug or any other portion of the wheel. As will be readily understood from the foregoing description and the drawings, oil may he inserted by pressing the. nozzle oi the oilcan against the hall It), and thereby displacing the latter. Said locking-plug may have radial apertures It to permit the passage of oil outward from the interior oi said plug into the recess 5 and thence around the axle. The huh may also have the annular oilchamhers I? in comnnmication with the inner open end of said locking-plug in order that oil may pass from said lockingplug directly into said annular chamber. It will he observed that by thus combining the locking-plug and automatic oil-valve the construction is simplilied and the manipulation is reduced to simple form and one aperture in the wall of the. huh is made to serve for the two tunctions, whereby danger of leakage is minimized.

I claim as my invention 1. The combination with a car-wheel having a recess for the reception of a locking-key, ot a valved locking-plug. substantially as described.

The combination with a ear-wheel having a recess for the reception of a locltingkey.

of a locking-plug comprising a hall-valve, sub stantially as described.

3. The combination With a car-Wheel having 6. The combination with a car-Wheel having a recess for the reception of a lockingkey, a recess for the reception of a locking key, of a cylindrical, tubular valved locking-plug, of a valved locking-plug apertnred at its side, substantially as described. substantially as described. 5 l. The combination With a car-Wheel having in testimony Whereofl have signed my name,

a recess for the reception of a locking key, in presence of two Witnesses, this 3d dayof Deof a cylindrical, tubular locking-pllug cornceinber, in the year 19%. prising a ballvalve,substantiall y as c escribed.

5. The combination Witha car-Wheel having TILLIAM TALLALE' IO a recess for the reception of a lockingkey, Vitnesses:

of a screw-threaded, valved locking-plug, sub- CYRUS KEHR, stantially as described. B. R. STOUT. 

